NiosIIExercisesVer3.docx

NiosIIExercisesVer3.docx

《NiosIIExercisesVer3.docx》由会员分享，可在线阅读，更多相关《NiosIIExercisesVer3.docx（71页珍藏版）》请在冰豆网上搜索。

NiosIIExercisesVer3

DesigningwithNiosIIandSOPCBuilder

ExerciseManual

Lab1

CreatingaNiosIISystem

_____________________________________________________________________

Note:

Forthefollowingsetoflabexercises,moredetailedstep-by-stepinstructionsareprovidedinthe“SolutionsManual”locatedatthebackofthisdocument.

_____________________________________________________________________

Hardwaresetuprequirements:

∙ByteBlaster,ByteBlasterII,ByteBlasterMV,orUSB-BlasterconnectedbetweencomputerandByteBlasterconnectionondevelopmentboard

∙Powersupplyconnectedtotheboard

1.CreateadirectoryontheCdriveofyourcomputercalled“altera_trn”ifthereisn’tonealready.Copythefilenios_II_lab_QII4.1.exetothatdirectoryanddoubleclickonit.Thiswillunzipthelabfilestoadirectorycallednios_II_lab.AmongthesefilesisthepartiallycompletedQuartusIIprojectcalledniosII_lab.qpfthatwewillusetoday.

2.StarttheQuartusIISoftware,andopenthisQuartusIIproject.

3.AssigndevicefamilyandpinoutsettingstotheQuartusIIproject:

SourceoneoftheTCLscriptsthatwehaveprovidedtoassignrelevantdevicesettingsandpinoutsfortheparticularFPGAdevelopmentboardthatyouareusing.Thatis,fromtheToolsmenuselectTclScripts,andthenfromtheprojectfolderhighlightthesetupscriptforyourdevelopmentboard（eg.Setup_Cyclone_1C20.tcl,etc.）,andthenclickRun.（IfunsureofwhichscripttorunpleasecheckwhichFPGAisonyourdevelopmentboardorconsulttheworkshopco-ordinator.）ThiswillsetupyourQuartusprojectforthelabtoday.

4.Let’snowbuildourembeddedsystem!

StartSOPCBuilder,andprovidethesystemname,niosII.YoucanchooseVHDLorVerilog,dependingonwhichimplementationlanguageyouprefer.IntheSPCBuilderwindow,TargettheparticularStratixorCyclonedevelopmentboardthatyouareusingandensurethattheSystemClockFrequencyissetto50MHz.

5.AddaNiosIIProcessortoyourdesign.FortheprocessorcoreselectNiosII/s.Settheinstructioncachesizeto4kbytes.ClicktheJTAGDebugModuletab.

6.SelecttheJTAGTargetConnectionDownloadLevel3optionandclickFinish.Thiswillgiveusallofthedebugoptionslistedonthehighlightedtab.

7.Renametheprocessorbyrightclickingonthecurrentnameandselectingrename.Typeincpuandhitenter.

NB:

ItisimportanttoenterthenamesofanyperipheralsormemorieswithinSOPCBuilderEXACTLYasshown.ThesearereferencedbypinsettingsandC–CodeexamplesandassucharealsoCASESENSITIVE.

8.AddanIDT71V416SRAMmemorytoyourdesign.Selectamemorysizeof1024kB,andrenamethememorytoext_ram.

9.AddaFlashMemory（CommonFlashInterface）toyourdesign-choosetheAMD29LV065D-120Rpresetwithanaddresswidthof23andadatawidthof8.Renamethememorytoext_flash.

10.AddtheJTAGUARTperipheralandacceptthedefaults.IntheSimulationtabbesuretoselectCreateModelSimaliastoopenawindowshowingoutputasASCIItext,andrenametheperipheraltojtag_uart.

11.AddaPIO（ParallelI/O）withbuswidthof16bitswithdirectionsettooutputportsonly.Renamethisperipheralseven_seg_pio.

12.AddanotherPIO（ParallelI/O）withbuswidthof8bitssettooutputportsonly.Renamethisperipheralled_pio.

13.AddonemorePIO（ParllelI/O）,thistimewithawidthof4bitssettoInputportsonly.Renamethisperipheralbutton_pio.

14.AddanIntervalTimerfromtheOthersectioninthelistofSOPCBuilderperipherals.Acceptthedefaults,andrenamethetimertosys_clk_timer.

15.AddanotherIntervalTimer,butthistimechangetheperiodtousec.Renamethetimertohigh_res_timer.（Wearegoingtousethislaterwhenwetimethespeedofsomeofoursoftwarefunctions.）

16.NowaddaSystemIDPeripheralfromtheOthersection.

17.AddanAvalonTri-StateBridge,beingsuretosettheRegisteredoption.Renametheperipheralext_ram_bus.

18.ToensurethatallbaseaddressesarevalidselectAuto-AssignBaseAddresses.

19.NowsettheResetandExceptionAddressesoftheCPUontheMore“cpu”Settingspage:

Chooseext_flashfortheResetAddressandext_ramfortheExceptionAddress.Also,UnchecktheSimulationcheckbox.Thiswillspeedupsystemgeneration.

Yoursystemshouldlooklikethis:

（withtheTargetsettotheboardyouareusing.）

20.NowclickGeneratesothatSOPCBuildercanproducetheparameterizedNiosIIprocessorsystem.

21.AftertheSOPCBuilderhasfinishedgeneratingyoursystem,openthepartially-completedniosII_lab.bdfschematicinQuartusII,andaddtheniosIIsymbol.

22.PressOKandlocateandplacethesymbolintheschematicsothatitlinesupwiththepinplacementsasshownbelow.Thepinsshouldalllineupexactly!

Iftheydon’t,chancesarethatyouneedtogobacktotheeSOPCBuilderandre-checkyourwork.

23.NowsavetheschematicandstartcompilationinQuartusbyselectingStartCompilationfromtheProcessingmenu.

Donotwaitforcompilationtocomplete.Wewillcontinuefromthispointduringthenextlab.

ENDOFLAB1

Lab2

SoftwareFlow

WearenowgoingtoprogramtheFPGAwiththedesignimage,andrunsomesoftwareonit.

1.OpentheQuartusIIProgrammer,anddownloadtheNiosIIFPGAdesign（ie.thenios_sys.sof）createdinthepreviouslabtotheNiosdevelopmentboard.

2.LaunchtheNiosIIIDE.

3.CreateanewsoftwareprojectcalledniosII_training_project.EnsurethattheptffilefromyourSOPCBuildersession（niosII.ptf）populatestheSOPCBuilderSystemfieldintheSelectTargetHardwaresection.Also,usetheBlankProjecttemplate.

4.PressNextandFinishtocreateanewsystemlibraryforyourapplication.

5.YouhavenowactuallycreatedtwonewsoftwareprojectsintheNiosIIIDE-aC/C++applicationprojectandasystemlibraryproject.However,theC/C++applicationprojectisblankandweneedtoaddsourcecodefilestotheproject.Addthesimple.cfiletotheprojectbyclickingontheNavigatortabonthelowerlefthandpaneloftheNiosIIIDEandexpandingtheniosII_training_projectfolder.

Then,openFileExplorerinWindowsandthenbrowsetothealtera_trn\nios_II_lab\softwarefolder.Dragthesimple.cfilefromthisfolderintotheniosII_training_projectfolderintheNavigatortabintheNiosIIIDE.

6.NowswitchbacktotheC/C++ProjecttabonthelefthandpanelintheNiosIIIDE.HighlighttheniosII_training_projectfolder,right-clickonthisfolder,andthenselectRefreshtoensurethattheprojectrecognizesthatwehaveaddedthesimple.cfile.

7.EdittheSystemLibraryPropertiesforthissoftwareproject,andensurethatthestdout,stderrandstdindevicesaresettojtag_uart.AlsoensurethatthePeriodicsystemtimerissettoSYS_CLK_TIMERandthattheProgram,Read-onlydata,andRead/writememoryfieldsaresettoext_ram.

8.WehavenowcreatedaprojecttorunoutofexternalSRAMthatusestheJTAGUARTasthestdiodevice.Now,compiletheprojectintheNiosIIIDE.

9.Afterthecompilationcompletes,downloadandRuntheprogramonthedevelopmentboard.

Note:

IfRunterminatesbeforethecodedownloadstoyourboard,andyougetamessagepertainingtotheJTAGdownloadcable.thenselectRun>Run…andfromtheTargetConnectiontabchoosetheappropriatedownloadcablethatyouareusingandhitApplyandRun.

ObservethattheconsolewindowintheNiosIIIDEdisplaystheprintfstatementfromthesimple.cprogram.PressofanyofthebuttonsontheboardtoshifttheLEDonespacetotheright.

10.NowstartthedebuggerbyselectingDebugAs->NiosIIHardware.Thedebuggerwilllaunch,connecttothetargetanddownloadtheprogramreadyfordebug.

11.Setbreakpointsonline22andline37.（IfthetexteditorintheNiosIIIDEdoesnotdisplaythelinernumberthenweneedtosetthoseinthePreferencesfromtheWindowmenu.OpentheC/C++folderandselectC/C++Editor.ChecktheShowlinenumbersboxandpressOK）.Acirclewillappearnexttothelinenumberonwhichyouhavesetabreakpoint.

12.Clickontheresumebutton

.

13.Now,selecttheVariableswindowandviewthecontentsofthebuttonsvariable.NoticethatthebuttonshavebeenreadasshownintheVariableswindow.Changethisviewtohexadecimalbyright-clickingonthebuttonsvalueandselectingFormat=>Hexadecimal.

14.Clickresume

again.Sincetheifexpressionisfalse（ie.nobuttonsarepressed）thestatementswithinthecurlybracesarenotexecutedandwewillnotbreakonline37,insteadwewillbreakonline22again.

15.HolddownswitchSW3ontheboardandclickresume.Anewvalueisstoredinthevariablebuttons.

16.ContinuetoholddownSW3andclickresumeagain.Thebreakpointonline37isnowcaughtasabuttonwaspressed,sotheifconditionistrue.NoticethatthelitLEDhasalsochangedposition.

17.Clickresume.

18.Double-clickonbuttonswithinthevariableswindow.Nowchangethevalueto0xeandpressOK.Clickresume.Theifstatementisexecutedastruebecausewewehavechangedthebuttonvalueusingthevariableswindow.

Thisisusefulforemulatingexternalhardwareeventsorotherconditionsthataredifficulttoreplicate!

19.Fromthedebugmenu,right-clickonthesoftwareproject,andselectTerminateandRemove.Thenclose（

）simple.cintheNiosIIIDE.

Lab3

RTLSimulation

InthislabwewilluseModelSim-Alteratosimulaterunningcode.

1.SOPCBuildercanbeusedtocustomizetheJTAGUARTsothatitcangenerateadatastreamtosendtothehostprocessorduringsimulation.Doubleclickthejtag_uartperipheral,andasthedialogboxopens,ClicktheSimulationtab.T